A historic downpour in Chiba Prefecture dumped more than 360 mm of rain in 24 hours, flooding roads and rail lines, leaving about 7,000 travelers stranded at Narita International Airport and causing four confirmed fatalities. The extreme event coincided with Japan’s busy Bon holiday travel week, raising immediate concerns for transport continuity and power reliability.
Governor Toshihito Kumagai described the situation as unprecedented, while the Japan Meteorological Agency issued its highest‑level heavy‑rain warning for the region. Record hourly totals of 115 mm in Chiba city and 97 mm in Sakura were logged. Soldiers were dispatched, the Ground Self‑Defence Force evacuated roughly 4,000 people from Soga station, and between 22,000 and 26,000 households lost electricity.
The flooding forced closure of major highways linking Narita to Tokyo, suspended several rail services and prompted airlines to issue delay notices, though no cancellations were announced. Power outages affected tens of thousands of homes, potentially curbing consumer spending and straining local utilities, while emergency shelters accommodated hundreds of displaced residents.
Sources differ on the scale of the power outage, citing 22,000, 25,000, and 26,000 households without electricity. Additionally, one report mentions a fifth person feared dead and a sixth unaccounted for, whereas the other accounts list only four confirmed deaths.